JENNIE GARTH’s meddling has estranged hubby, “Twilight” hunk Peter Facinelli, gnashing his teeth, sources say.

The “90210” star, 40, upset Facinelli, 39, when she called his new squeeze, “Thor” cutie Jaimie Alexander, to discuss the couple’s three daughters, insiders say.

“It was a friendly phone call,” a friend told The ENQUIRER.

“Jennie knows Jaimie will be spending time around their girls, so she wanted to let her know their likes and dislikes, and maybe make the bonding easier.”

But Facinelli – who plays vampire patriarch Carlisle Cullen in “The Twilight Saga” – consid­ered Jennie’s “courtesy call” to be plain old-fashioned meddling, said another source.

“Peter told Jennie that he’s perfectly capable of easing the transition of a new relationship for his daughters,” revealed the source.

“He said that he doesn’t want her running interference.”

But insiders say that Jennie has made it clear their lives are still tied together when it comes to raising their girls – Luca, 15, Lola, 10, and Fiona, 6.

“What Peter may see as med­dling, Jennie sees as exercising her duties as a mother,” the friend explained.

“She told Peter, ‘Our kids come first, not your ego or your love life.’”

Pals say the couple has reached a tenuous truce since their 11-year marriage ended in March amid charges that Facinelli had cheated – rumors they both denied.

He’s since moved on with  Jaimie, 28, an up-and-coming actress who worked with him on his film “Loosies” and the Showtime series “Nurse Jackie.”

And now that Jennie has shed 30 pounds and is pursuing new projects, pals are urging her to jump into the dating game.

“Jennie really needs a romance of her own,” said the friend. “Then, I think things would fall into place more easily when it comes to dealing with Peter.”